mkl_?csrmv
mkl_?csrmv
Computes matrix - vector product of a sparse matrix stored in the CSR format (deprecated).
Syntax
void
mkl_scsrmv
(
const
char
*transa
,
const
MKL_INT
*m
,
const
MKL_INT
*k
,
const
float
*alpha
,
const
char
*matdescra
,
const
float
*val
,
const
MKL_INT
*indx
,
const
MKL_INT
*pntrb
,
const
MKL_INT
*pntre
,
const
float
*x
,
const
float
*beta
,
float
*y
);
void
mkl_dcsrmv
(
const
char
*transa
,
const
MKL_INT
*m
,
const
MKL_INT
*k
,
const
double
*alpha
,
const
char
*matdescra
,
const
double
*val
,
const
MKL_INT
*indx
,
const
MKL_INT
*pntrb
,
const
MKL_INT
*pntre
,
const
double
*x
,
const
double
*beta
,
double
*y
);
void
mkl_ccsrmv
(
const
char
*transa
,
const
MKL_INT
*m
,
const
MKL_INT
*k
,
const
MKL_Complex8
*alpha
,
const
char
*matdescra
,
const
MKL_Complex8
*val
,
const
MKL_INT
*indx
,
const
MKL_INT
*pntrb
,
const
MKL_INT
*pntre
,
const
MKL_Complex8
*x
,
const
MKL_Complex8
*beta
,
MKL_Complex8
*y
);
void
mkl_zcsrmv
(
const
char
*transa
,
const
MKL_INT
*m
,
const
MKL_INT
*k
,
const
MKL_Complex16
*alpha
,
const
char
*matdescra
,
const
MKL_Complex16
*val
,
const
MKL_INT
*indx
,
const
MKL_INT
*pntrb
,
const
MKL_INT
*pntre
,
const
MKL_Complex16
*x
,
const
MKL_Complex16
*beta
,
MKL_Complex16
*y
);
Include Files
- mkl.h
Description
This routine is deprecated. Use mkl_sparse_?_mvfrom the Inspector-executor Sparse BLAS interface instead.
Intel® oneAPI Math Kernel Library
The
mkl_?csrmv
routine performs a matrix-vector operation defined as y := alpha*A*x + beta*y
or
y := alpha*AT*x + beta*y,
where:
alpha
and beta
are scalars, x
and y
are vectors, A
is an m
-by-k
sparse matrix in the CSR format, A
T
is the transpose of A
.This routine supports a CSR format both with one-based indexing and zero-based indexing.
Input Parameters
- transa
- Specifies the operation.Ifortransa='N''n', theny:=alpha*A*x+beta*yIfortransa='T''t'or'C'or'c', then,y:=alpha*AT*x+beta*y
- m
- Number of rows of the matrixA.
- k
- Number of columns of the matrixA.
- alpha
- Specifies the scalaralpha.
- matdescra
- Array of six elements, specifies properties of the matrix used for operation. Only first four array elements are used, their possible values are given inTable “Possible Values of the Parameter. Possible combinations of element values of this parameter are given inmatdescra(descra)”Table “Possible Combinations of Element Values of the Parameter.matdescra”
- val
- Array containing non-zero elements of the matrixA.Its length is.pntre[m-1] -pntrb[0]Refer tovaluesarray description in CSR Format for more details.
- indx
- For one-based indexing, array containing the column indices plus one for each non-zero element of the matrixA. For zero-based indexing, array containing the column indices for each non-zero element of the matrixA.Its length is equal to length of thevalarray.Refer tocolumnsarray description in CSR Format for more details.
- pntrb
- Array of lengthm.This array contains row indices, such thatis the first index of rowpntrb[i] -pntrb[0]iin the arraysvalandindx.Refer topointerbarray description in CSR Format for more details.
- pntre
- Array of lengthm.This array contains row indices, such thatis the last index of rowpntre[i] -pntrb[0]-1iin the arraysvalandindx.Refer topointerEarray description in CSR Format for more details.
- x
- Array, size at leastkifortransa='N''n'and at leastmotherwise. On entry, the arrayxmust contain the vectorx.
- beta
- Specifies the scalarbeta.
- y
- Array, size at leastmifortransa='N''n'and at leastkotherwise. On entry, the arrayymust contain the vectory.
Output Parameters
- y
- Overwritten by the updated vectory.